Engine Faults; General - Whisper Power W-SQ6 User Manual

PROBLEM
Generator output voltage too
low under load (less than
210V/105V).
In no load condition it is ok
Generator voltage too high,
(more than 245V/130V)
Generator voltage fluctuates.
Generator is not able to start an
electric motor
5.2

ENGINE FAULTS

Remove 3 Amp. fuse in the control panel
while working on the generator to prevent the
engine from starting.
5.2.1

General

Most electrical problems relating to Voltage or Frequency
are due to wrong engine speed. Note that RPM and Hz
are basically the same.
Use the problem solving table to find the cause of a wrong
engine speed. When there is no obvious cause one can
adjust the RPM (refer to special procedures).
Failure code Problem
Communication error between the panel end the generator
COMMUNICATION
Starter battery voltage too low
LOW START BAT
No output battery charging voltage
ALTERNATOR
AC-alternator temperature is to high (generators for mobile applications only)
AC-ALTERN. TEMP
Coolant temperature is too high
WATER TEMP
Oil pressure failure
OIL PRESSURE
Generator AC output voltage is either too high or too low
AC VOLTAGE
Generator is in overload
HIGH CURRENT
Output frequency of the generator is too low
FREQUENCY
EN / W-SQ6 for mobile applications / October 2008
CAUSE
• Generator is overloaded.
• Engine is not reaching the rated RPM.
• Defective capacitor
• Engine is running too fast (RPM too
high).
• Over-energising
due
capacitors
• Presence of a strong capacitive load
(leading power factor)
• Disturbances on the electrical system/
user side.
• Engine runs irregularly.
If the generator is unable to supply
enough power to start an AC electric
motor, this is usually because this motor
draws too much current during starting
SOLUTION
Switch off a load; (part off) consumers.
Refer to engine RPM problems
Check capacitor and replace if necessary
(refer to special procedures).
Check engine speed and adjust (refer to
special procedures).
Check capacitor specification and replace
to defective
capacitors if necessary.
Compensate for this capacity and seek for
experts advice (WHISPER POWER customers
service)
Check if electrical load is fluctuating
When engine runs irregularly refer to section:
"Engine runs irregularly".
Check the electric motor's current draw
required for starting. This should not exceed
the rated generator peak output current. This
could be remedied by providing stronger
capacitors to the motor or using a "soft-start".
Inquire at your nearest Whisper Power dealer
or directly at the manufacturer, Whisper Power
in the Netherlands.
When the engine is not cranking well, starting problems
almost always originate from battery problems or poor
battery cable connections.
When the engine is cranking, well starting problems
almost always originate from lack of fuel or air bubbles in
the fuel pipes.
A failure code is displayed when a hardware failure at the
generator is detected.
TROUBLE SHOOTING
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